Sewer-ventilating furnace



(No Model.)

L. L. BENSON .85 W, T. ST'ILWELL.

SEWER. VENTILATING FURNACE. No. 355,295. Patented Jan. 4, 1887.

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NITED STATES PATENT Erica.

LYMAN L. BENSON AND WILLIAM H. STILWELL, OF K'ALAMAZOO, MICHIGAN.

SEWER-VENTILATlNG FURNACE.

SPECIFICATION forming part of Letters Patent No. 35 5,295, dated January 4, 1887.

7 Applicatim filed April 12, 1886.

To all whom it may concern.-

Be it known that we, LYMAN L. Benson and WILLIAM T. STILWELL, citizens of the United States, residing at Kalamazoo, county of Kalamazoo, State of Michigan, have invented a new and useful Sewer-Ventilating Furnace, of which the following is a specification;

This invention relates to that system of destroying and expelling noxious gases from sewers and drains, in which a furnace is employed at some point in the ventilating draft-pipe, which is connected at its base with the drain or sewer, and is elevated into the open air.

The object of this invention is to construct an improved furnace for the above-named use, substantially as below described and claimed.

In the drawings, forming a part of this specification, Figure 1 is a vertical section of the furnace and a cross-section of the drain or sewer on dotted line 1 1 in Fig. 3. Fig. 2 is a side elevation of a change in construction with one side inclosure removed, the drain or sewer being in cross-section. Fig. 8 is an end view,looking from a point at the right of Fig. 1; Fig. 4, a vertical section showing achange in configuration from Fig. 2; and Fig. 5 is a horizontal section on dotted line 2 2 in Fig.4, looking from a point above.

Referring to the letters of reference marked on the drawings, D represents either-a drainpipe in the basement of a building,which pipe leads out and connects with the main sewer, or it may serve to illustrate the sewer proper.

In Figs. 1 and 3, A is a pipe connecting at one end with the drain or sewer D, extending upward, thence turning laterally and connecting with one end of the furnace B, at the upper side of said furnace. On top of the furnace, at the opposite end, the draft-pipe O is connected with the furnace. This draft-pipe in use of course extends into the open air in the ordinary manner of sewer-ventilating pipes. The pipe 0 in the several figures is here shown broken.

At a are shown a series of gas-burners,only one being shown in Fig. 4, located at such a position that the top of the flames or flame comes below a horizontal plane touching the point r in the several figures, and hence be low the entrance of the passage-way for the flowing gases from the drain or sewer into the A and the flame-chamber.

furnace. The flow of the gases is indicated by Serial No. 193,533. (No model.)

the arrows. The lower boundary of the flowflowing gases into the furnace, and that single,

entrance at one of the vertical ends of the furnace and on a plane above the flame or flames,

and only one exit at the opposite upper'end of the furnace on-a vertical plane beyond the flame or flames.

The flame or flames is guarded from any sudden rushes of gases or air up the passage-way from the drain or sewer, from whatever cause, by the right-hand wall of the furnace extending to a plane above the flame in Fig. 1, or by the separating partition 1", hereinafter described. (Shown in Figs. 2and 4.) The flow of the gases through the furnace is between the top of the flames and the upper horizontal wall of the furnace. Thus the gases flow over immediately near to and beyond the flames'on their way out of the draftpipe G. The rising heat from the flames prevents the flowing gases lowering out of their defined course, and what are not destroyed by the first flames are still acted upon by theheat of the succeeding flames over which they flow.

The suction-draft from the drain or sewer D and the expelling draft up pipe 0 are as natural and successful as the draft of an ordinary fuel-stove having a hearth and stove-pipe.

By employing a single passage-way into, through, and out of the furnace, as herein defined, we secure better results in the draft,and are enabled to draw more noxious gases into the furnace, and to concentrate their flow in a manner to destroy them more effectually than by the employment of any other furnace known to us. These facts we have found by actual and extensive experiments and tests.

The construction in Fig. 2 is provided with a separatingwalhr, between the passage-way pears in Figs. 4 and 5. This wall or partition 0* extends laterally, connecting with the side walls of the furnace, and also connects with the bottom wall and terminates at the upper end at a horizontal plane above the flames, leaving a space between said upper end and the rooflng-wall'of the furnace. This is considered an equivalent to Fig. 1 as to use; but one plan will be found convenient in some in.

The same wall apstances, and the other in other instances, ac-

cording to the location of the sewer or drain at the place where the furnace is attached.

In Fig. 4 only one flame is shown, but the 5 same vertical passage-way for the flow of the gases appears, and also the upper wall of the furnace forming a roof entirely over said pas sage-way, as in the other figures. WVhen the upward-flowing gases meet this roofingwall,

they are turned laterally, and flow over and past the flame before passing up the draftpipe. The upper wall extends to and connects with the base-of the draft-pipe O; Fig.4 shows a furnace of less dimensions and capacity than the others in Figs. 1 and 2,designed especially for small drain-pipes.

The space in the furnace below the flame is greater in Figs. 1 and 2 than in" Fig. 4; but this is regulated in accordance with the needed space in the chamber.

The furnace should be closed-that is,should have no means of entrance or openings in the walls but what are provided with means to keep them closed-to prevent the escape of noxious gases in the building when the flames Having thus described the construction and utility of our improved 'device,what we claim, and desire to secure by Letters Patent, is

In a system of destroying and expelling sewer-gases by means of a furnace and flame therein, a furnace in which a suitable number of burners are located on such a plane as will leave a narrow space between the top inclosu re of the furnace and the top of the flame,one end of this space at one ofthe ends of the furnace beyond the flame having an exit immediately into the draft-pipe connecting the furnace at this end, in connection with the entrance passage-way separated from the furnace-interior, and leading from the sewer to the top of the opposite end of the furnace, and thence later ally opening into this end of the space beneath the top iuelosure, substantially as set forth.

In testimony of the foregoing we have hereunto subseribed our names in presence of two witnesses.

LYMAN L. BENSON. \VILLIAM T. STILWVELL. 

